Is there a recommended option for washer/dryer that doesn't require coins/bills but instead takes phone pay or a card, so that both tenants and prop managers don't have to deal with coins and bills?

You will learn the tax advantages in the process.

I am struggling trying to decide my next step- should I try to pay down my two current properties that I own as much as I can (I make about 150-200k a year).

Now you need to figure out how to find deals and pay for them.

Most people prefer to buy and the past year rents are priced much higher then people want to pay. 

In commercial real estate the tenant pays for everything including those pesky condo fees

I’m thinking about selling one of my debt free rentals to pay off the loan of the new house – thus erasing the $3500/month loan payment.

However, from my understanding, it takes a long time to pay down the principle when making mortgage payments.

Thank you in advance.Also as far as what I put in the letter, I usually say that me and my partner are looking for properties that need work, and can pay cash and offer quick closing.

I know in Texas if you have 100 percent disability you do not have to pay property tax.