We have a mix of ownership at the moment: 2 of them are owned by the LLC, the rest are titled to a single partner.We also have a mix of financial instruments at play: 3 of them titled to a single partner have a mortgage with a bank, 1 of the homes owned by the LLC has a private loan, and the last 1 owned by the LLC is all-cash at the moment.I'm less interested in asset protection from the LLC since we're using Umbrella insurance as our safety net.My main concern is filing taxes properly and accurately (attributing gains and losses to each partner correctly), especially since we started down only-LLC ownership and transitioned part way to personal-and-LLC ownership of our properties.

Who knows how accurate this is but hopefully this points you in some direction.

Trulia has a good heat map that is fairly accurate and will give you a pretty good picture.

Checking account for the LLC and keep accurate records.  

This may seem time consuming, but once you've done it for a few units in a specific community, then you can start using $/SF capex numbers (keep in mind these numbers won't be accurate for other communities, if the HOA covers different things).

Honestly, I switched over to PriceLabs because I stumbled on a STR blogger that claimed it was more accurate for US-based STR properties.

This was my first time using Homestyler for the drawings so they are not completely accurate, especially the furniture layout and size of cabinets, etc.

Nothing about this as an option seems good to me based on what you've said other than the original rents vs. sale price, but I don't think it is definitively accurate on this.

And sorry for so many questions but I want to be 100% accurate in my recommendation if you don't mind.  3 last questions if you don't mind:What is your purchase price?

You’re required to provide a placement memorandum that accurately describes the investment.