Furnished Finder for example depending on your market may not be the best option if you're renting out an entire place because nurses might not want to pay what you need just to make the mortgage and utilities however if you are renting by the room it may make more sense but of course, all of this is market dependent.

Depends on what youre looking for.

Dependent on the countries style of ownership or lack there of.2. 

Depends on repairs you’re doing.

Really depends on the area you like the best! 

This benefits the buyer more, since depending on how it is written, it can lock in a future price and if the buyer would benefit from exercising the option he may, if the numbers run against him he can back out. 

Along with that, make sure the seller is either crediting you or giving the renters' deposits to you or back to tenants, depending on how you set it up.

@Daniel Suarez, Another option depending on your desire to go deeper into the sec 8 world would be to 1031 and purchase multiple less expensive properties. 

It depends.

So the answer really depends on the areas you are considering.