Secondly, if you do offer these services at your property, do you use your business account, debit, or credit card to pay for the memberships?

When you do it, you show your cards, but new people don't knew because they are thirsting for help and will take it from literally anybody.

I use Stessa for accounting, I love it, it links right to my bank account/credit card accounts and I can assign purchases to different properties and units of the property for multi-unit properties and at the end of the year I have a simple report to give my tax professional 

Who knows, maybe there are adventurous folks who’ve lived, worked, or invested in all 19 states serving as their advisors.When it comes time to sell those properties, the majority of prospective buyers will be locals (unless sell on platforms tailored to RE investors), likely represented by local realtors who scrutinize the properties in person and guard the buyers’ interests - the cards would probably be stacked against the sellers who’ve never seen the properties with their own eyes and lacked guidance from experts with equal amount of knowledge when they bought the properties.

Most start by analyzing deals and forget the fundamentals of every business, like getting a Tax ID, bank account later, Business Credit cards, and lines of credit.

I also use the Costco/Citibank VISA cash back card to pay for expenses.  

The obvious answer here is to somehow get some income and start paying down the credit card debt. 

You screen them the same way a hotel does: not at all.The only thing you need to verify is their credit card number.

•After 3–6 months, apply for tier 2 business credit cards (e.g., Capital One Spark, Chase Ink).

Could you send them a credit/debit card you can reload from America?