Be aware, however, that loans with less than a 20% down payment will permanently carry mortgage insurance and their rate is higher than other lenders.

So, if $237K is my calculated number, that's my max permanent loan.

Again, you'll get hit when you refinance into a permanent loan. 75% of a smaller number than you may have spent.Since you are not planning to sell, you just need to know if you can live with the final valuation and costs to build.

I buy the rentals with hard money, complete the rehab and then refinance into permanent loans.

Make sure you know what the specific terms are of the permanent / take-out financing before taking out a hard money loan, so that you can ensure the viability of exiting the acquisition bridge loan.

That person is not responsible for the property but needs to be a local permanent resident. 

Non-warrantable features for conventional loansCommon non-warrantable properties include condotels, timeshares, fractional ownership properties, multi-unit condos (the condo unit itself is two units), condos in a permanent care/assistance residence, and other projects which require owners to join an organization, such as a golf club.Manufactured housing projects and other developments which are not legally considered real estate are also excluded from warrantability.

After much thought, I've realized this house may only be a 3 year house because of sound transfer issues that I'm still working on, but because of that I don't want to spend $30K on a permanent structure in the back yard, I want to be able to take it off the property if I sell and relocate it, so a tiny home that can be moved later.I don't have room to move a structure on the sides of the house, only the back yard.

Based on these factors, you will not be able to get 75% LTV permanent financing.

Facebook is allowing a number of new hires and current employees to work from anywhere going forward (more permanently).