I’ve seen lots at an asking price of $300k but the market will only bear $150k for it.

Taking out any bearing walls? 

We always decide to rent with 8 rentals now and this would be are 9th we just closed on and all off are rentals have a roi of 20% and higher.

And make sure that it is an interest bearing account with no fees - if you can't get both of those then skip any account that has fees because those will exceed any interest that would be paid.

Bear with us . . . we're on it!

i.e Would the back-tax payment plan have any bearing on my ability to refinance?

But perhaps the investor is willing to bear the risk and pay more in the long run to avoid coming up with the balloon in the short term. 

You need to understand what the market will bear when determining investing in a buy-and-hold property.

There have been other good forum posts on STR bull/bear talk lately.  

Park owned homes push the cap rate up from 10 to whatever the market will bear.