We plan on renting this home out next year and buy our forever home.
Just saw this. BE CAREFUL.
Many primary residence mortgages come with clauses that you will (duh) reside in the home and not use it as a rental for a fixed period of time (often at least 2 years, or 2/5 years). Real estate mortgages tend to be as much as 0.5% higher because they carry more risk to the bank.
Now... you might be thinking "how will the bank know"... and they probably won't. UNTIL you apply for another mortage for your 'forever home' - in which case they won't like seeing two SFH as primary residences.
Now one way to approach this is to just take out a normal mortgage since you intend to use it for a while as your primary residence, and then in a year or two ask the bank to adjust the contract to make it a rental property. There's a reasonable chance they might not make a change to your interest rate if you have enough equity stored up... or it will just be a slight bump.
Either way... read the fine print.