@Laura33 Thank you for taking the time to read my post! This is some great insight/info to digest and consider. :)
Spouse is a mental health therapist, all virtual. In the last 6 months she started accepting insurance and went from 10-12 hours per week at $100+/hr to 20 hours weekly at the same rate. She ended up pausing her "accepting new clients" button as she gets used to the higher workload. I think 20 hours a week is doable long term for her. I think she could consistently schedule 25 hours each week knowing there will be cancellations and reschedules. In a dire situation, she could ramp up to 30 hours, but it wouldn't be sustainable long term.
There are quite a few costs going into the court. The structure is 73x120 and costs $76k before tax. End walls are another $6k-8k each depending on the options I choose. Shipping is another $7k. Install was quoted at $60k. There were some phantom costs of another $5k for finishing details. That's before I even prep the ground, or lay asphalt, or install the court surface, lighting, etc.
Now, if I can't just buy the 'off the shelf version' due to local building regulations, I'd have to have the structure engineered which costs more. Essentially the gables are 20' apart in the 'off the shelf version,' and the engineered version would have to be 15' apart, which increases materials and installation costs. There is some gray area there for two reasons: (1) TN is about as lax as it comes with building, especially given I'm not going to be in a residential area and (2) the structure is categorized as a 'temporary' building based on what it's made of -- even if it stands there for 20+ years.
I spoke with my in-laws last night because they had careers in architecture and real estate. They suggested we basically do a master plan for the 5 acres and designate phases for construction. In that sense, I think it makes sense to get all the permitting and approvals like you mentioned. Phase 1 is building House 2. Phase 2 would be sport court after House 1 is sold/House 2 is paid off.
I also plan on making an edit to my original above regarding the cash in the high yield savings account. Essentially we will not touch or draw from that $200k+ until the construction loan converts to a traditional mortgage. At that point I'd probably take at least half of it and pay down the mortgage to reduce interest costs and keep at least $50k as our emergency fund.
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@sonofsven Negative, there are no indoor courts in my area to lease. They don't exist, which is why I'm so gung-ho to monopolize. And if I booked indoor time somewhere, they wouldn't let me teach/earn money on it unless I was an employee. The math doesn't make sense either given it would cost me $25+/hr, plus a 90 minute round trip. If there was a club within 15-20 minutes of me that had indoors, I'd be working there part-time on nights and weekends. I currently already do that at my own local club, but it's all outdoors so things die down Nov - Feb most years. Double whammy is the place is being sold at the end of this year, so my fate is uncertain. They may bring new pros in, or want to renegotiate the terms / my split to the club.
House 1 is 3k sq ft. We are aiming for 2.5-2.8k sq ft in an attempt to downsize & create a more efficient footprint. General quote for our level 1 finishes is about $180/sq ft -- cheaper than buying a house on the market because the builder isn't selling us the land, if that makes sense. 2,500 sq ft * $180 = $450k. 2,800 * 180 = $504k. If it increased to $190/sq ft the costs would be $475k and $532k respectively. Our $200k cash + net equity from sale of House 1 currently covers that worst case scenario of $532k. In the coming months before breaking ground, another $6k - $10k will be added to the war chest. If the quote comes back above that, then plan is to simply postpone construction until the numbers make sense (we save more). We're in the late stages of finalizing a floor plan. After that, the builders said 2-3 weeks to get a detailed quote together.