My plan is to maintain the status quo and benefit from annual rent increases and equity gain as the tenants' rent covers the mortgage.

You have to have qualified technicians on staff, good luck finding someone for under $70,000 plus benefits these days.

It’s to your benefit to learn how to buy Properties using Subject To, at a discount, safely.Subject To Has 5 phases (ok, there are more, but I’m covering these 5 for now) JI did a spreadsheet on how to figure a good deal on Subject To.

Anyone prepared to do this should be able to articulate the reason and how it will benefit them.

You won't qualify for an FHA loan and if you've got 25% down, you wouldn't benefit from one anyway.

As far as benefit to the seller goes, @Matthew Paul I think you are probably right on the money and regardless of whether they would have preferred to stay in this house rather than move, it is likely providing them some excellent cash flow; and I'd be hard-pressed to come up with a deal that serves both parties better than the current situation. 

If you are going to rent it and want to take advantage of the tax benefits be aware of material participation requirements and limitations on personal use. 

I'd recommend looking at costs. your build cost is going to be well over other homes because of the fixed costs like slab, Hvac, roof, etc. check the market drivers and weight the benefits of short term versus long term. long term is no furniture and help pays mortgage but at this size it doesn't really cover everything. we didn't find a lot of economies of scale in single family detached. can you build more than one unit?

The benefit is that, in some cases, you use your cryptocurrencies as collateral, so you don't have to sell them and pay capital gains tax.

Since generally the benefit of a house hack is to hold the primary residence loan as long as possible, if you hold it long-term, you could still be forced to pay the mortgage insurance 10+ years down the line.Plus, you can only have one FHA loan (with some exceptions) at a time, so I'd rather use this house hack for 5% down which I can repeat and save FHA for another time.