I don't think he would allow someone that had to put the fee on a credit card.

Some will be ok in 2nd position and some will not and force you to refinance out the first - but those are options that are probably cheaper than credit cards 

Dedicate one checking account and credit card exclusively to real estate.

@Mark Updegraff guessing the upside of my stock portfolio is definitely the wild card, as its more discretionary investment we went heavy risk with AI / tech with large upsides but also wild swings.

We use the AppFolio system that allows for credit card payments, ACH, etc. 

Also putting a business card and flyer on the door could work.

I also use their virtual credit cards which enables me to assign a card to a specific person, like the cleaner for my STR for example, so when she runs a charge, it automatically drops into the right account in terms of categorizing my expenses.

But it feels like if you keep cashing out equity on your properties to buy another, you end up with multiple properties but with your equity stretched really thin, like a house of cards ready to collapse. 

BTW there is a free trial and the Starter monthly plan is $119.It also allows you to search through consumer information such as property owner "credit worthiness," Credit card usage, buying power, age, language, family members in the house, and many other fields that are above and beyond property characteristics, which is unique.

Oregon doesn't have a card or other easy way to check.Laugh of the day...we had a client, who was a stripper, with a lizard she kept in her bra, until it escaped in our car.