My assumptions are that the taxes are billed to house and you are certain the house isn't vacant. 

I can see that the investments made available through RTR are mainly new construction homes in good locations, which was different from my initial assumption about the homes being offered.

Trends can lead to an assumption but I'm not seasoned enough to come to that conclusion.Thanks for the advice  @Hadar Orkibi!

Since census is only done once every ten years, everything is an assumption.

My assumption is that having the separate banking infrastructure could be good as I expand my portfolio.

Not necessarily to make more "asks" in the negotiation, but to reduce your assumptions that X won't be an issue (i.e., assume fewer things are OK and be more cautious about possible issues).Besides the overall state of the market, which has taken more buyers out of the market and thus shifted more power to buyers vs. sellers, also look at that specific property, specifically its time on market and listing history.If it was listed 6 months ago, didn't sell, and was relisted 2 months ago and has already been on market 50+ days before your offer was accepted, I'd think you'd be in a stronger position to make more asks from the inspection results, than if this was the first time it was listed and it's only been 3 DOM, and especially if there were multiple offers (though sometimes those are made-up so I'd give more weight to DOM than alleged other offers).

@Joe Splitrock - This is a popular assumption, and it makes sense to me "Maybe the goal is to slow investors to encourage owner occupied instead?" 

Some assumptions I would test you on would be vacancy and maintenance. 

I am not sure how/why a turnkey company is making assumptions of both future appreciation , and increased rents . 

Some might wonder why that is...well, the answer is that if you are underwriting properly, you are using conservative vacancy factors, decompressing cap rates, above-market debt interest rates, conservative property tax assumptions, etc...even if the property is performing better today.