I would recommend a LOT more reading before you jump into miles and points credit cards. It's easy to apply for the wrong cards and miss out on more lucrative opportunities. I think you're also approaching the accumulation of points/miles incorrectly. The point isn't to accumulate miles for the sake of accumulating miles (yay, 100k miles!). Instead, you need to be strategic about the cards you sign up for, based upon your goals for travel. In your 100k points/miles card scenario, you'd end up with 50k UR, 20k Cap1 miles, and 30k WF miles. For what? What are your plans for the miles?
Your application strategy is also not likely to work. Cap1 is stingy with approvals, pulls all 3 credit bureaus, and will likely not approve you for 3 cards in a short amount of time. Chase has the 5/24 rule; BoA has 2/3/4 rule, etc. You'd be wasting 6 hard pulls for your $1k intro bonus goal, when you could get a single card with a signup bonus value of $2000+. If you are scared off by the annual fees, even more reason to rethink your strategy. Why sign up for 6 cards to only get a $950 bonus? Would you use these cards for the long-term or just cancel after a year? You'll be reducing your AAoA if you cancel.
My recommendation: First, set your travel goals. Start with the place, not the points/miles. Once you've done that, get the Barclay Arrival+ with 70k signup bonus for travel (your DW could do the same). Annual fee is currently waived, $89 after 1st year. You'd have 160,000 miles after you both complete MSR, worth $1,600 toward travel of any kind. I'm not a cash back CC churner, but I also don't think the value proposition for cash back signup bonuses is all that great. You could churn bank account bonuses and do way better than $950 in a year. I did $1200 in 3 months in 2017 when I hit it hard.
There are a lot of strategies in the miles and points game, but I want to reiterate that signing up for bonuses just to get the bonuses is silly. Have a plan with what to do with the miles first.
I'm happy to chat about any aspect of the miles/points game.