As long as you have someone you trust and that knows what they are looking for, I see no reason to worry about it. 

I built this tiny house to save money on rent and to live in for as long as we could.

Now many people do this anyway and I hear banks have a 1 year look back period so most people wait 18+ months and then do it and as long as they don't fall behind on the mortgage the bank should never look back at the loan.

As long as each are paid less than the standard deduction they have no filing requirement.

But, investing in rentals properties, itself isn't an active business.Yes, you can, as long as the laptop is used exclusively for managing your portfolio (which is probably a stretch, but it's another topic.)

As long as there are houses, and people need to pay for these houses, and pay to main tain them and deal with tenants.... people NEED to sell their house fast.SO like the @Joe Villeneuve man said.You do what you always have done that works for you.The reason why I say SEO... well because now more then ever you need to make a lasting impression.

The bank doesn't force you into any particular LTV as long as it's at or below whatever their max is.

You can chase these rabbits for as long as you wish.

Some lenders will require 2 years of tax returns but Fannie guidelines actually allow you to apply rental income to DTI immediately as long as you have a lease.

So, as long as you can do this for your rental property (think duplex, triplex or 4-plex), an FHA loan could be a viable option.