How do we file taxes under our business (Our LLC) ?

If you are going to tell them its your home of record, make sure it looks like it. i.g. your mail is delivered there, your tax filing with the county is your home of record, or homestead exemption, etc...

I wanted somewhere close to Nor Cal but much more friendly tenant/landlord laws, 4th lowest property taxes in the Nation, rent growth, job growth, population growth, strong appreciation, limited land, close to Lake Tahoe, etc. 

That does not mean that pay stubs and tax returns are the only way to prove ATR fir example bank statement loans for the self employed is a method to verify ATR. 

As a result, it seems the value is really just very long-term and if we sold it in the future, any repairs and taxes would cancel out much of the gains (depending, of course, on the pace of appreciation -- who knows what that'll be?). 

Prior going to the conference my fear was that most of the people going to the conference was in the single family homes and we wouldn't be as much of value to each other.

Exports download quickly and you can export MLS listing info (including agent contact info), tax info, foreclosure info, and mortgage info along with all the regular property info. -  They have a ton of preset lead types including Absentee Owners, Free & Clear, Vacants, etc and MLS and Pending.-  Lead stacking works well, and I like their Advanced Filters.

This is for my 2023 tax return, and I have filed an extension. 

Most of these concerns should have been understood prior to going under contract.

Remember In Hawaii, STRs come with extra taxes: a 10.25% Transient Accommodations Tax (TAT), a 4% General Excise Tax (GET), plus a 0.5% Oahu Surcharge Tax on gross income from rents.