From the few owner's I have spoken to I have heard $80-100k for larger 5/6 bed homes, but this is the total furnish cost all in. 

Also, what kind of properties do you currently invest in? 

Not directly related to the question, but what kind of neighborhood are you buying in- is this some kind of war zone?

It really comes down to a relationships and putting the work in. 

As in, I would be buying the most expensive property in the area or some features that are not changeable.

On the water why did it come in? 

Use properties you purchase, combined with co-hosting, to scale smartly with less money in. 

If they are planning on the $100,000 equity ini their pocket, you need to clarify early on what your offer is, so you're both not wasting time. 

Whether financing  a home or investment property the cost to get in is a lot less costly getting in if you occupy. 

If owning rental properties is something you want to do in the future, it sounds like when you are ready to make the move from your rental, one of the attributes you should consider when you do buy the home you want to live in, is if it would make sense to convert to a rental when you are ready to move out or if a live-in flip makes sense.