I wouldn't bet my life on 50%, but I would bet they are more problematic than the typical long-term renter.

Typically a broker will work with at least 10 DSCR lenders so they should have a variety to reach out for quotes to. 

They typically provide education and also have classes/courses to take.

Your Schedule C at the top will typically list both of you since you are filing a joint return.

Typically speaking their correlated more with the equity markets then the real estate market.

Small businesses are typically valued at a multiple of SDE.

Sometimes folks overlook how real prce apprecation can be impacted by having acreage that’s not typical in suburban areas.In Phoenix, where I’m based, a lot of us collaborate with local probate attorneys who know about hidden opportunities that never see the open market.

However, if this is your first flip/investment it typically is easier to do something local and then expand to further markets.

As a side note typically I do not use my deferred tax dollars to invest in traditional real estate as the benefits (depreciation etc) are all lost when using a self directed IRA - My guess is build to rent will provide little to no cash flow to build the account - it will all be locked in the property. 

Typically people charging for that service are doing it because they need the money...if you catch my drift.