But she wants to pay by credit card.

Are you thinking of putting sparkly hearts on the document to demonstrate your creativity, is your pain point the down payment and you're trying to navigate that with seller financing, is the issue that the in-place tenants aren't paying rent? 

They furnish it, pay the utilities and rent it out to people staying for a short time. 

I am not in your market, but since it has been three days with no local feedback I have an idea to share with you.Go to your local court case lookup site and pull the cases for the third week of the month.

Why would we have to pay several thousand dollars to remove portions of the tree to satisfy their complaint?

I don’t expect any favors or pricing advantage because we pay competitive wages but if someone else is committed to doing a job as good and cheaper then the bottom line is I’m still trying to run my business and make a profit.

MLS works well, and you find qualified leads, but you do end up having to pay a large commission to other realtors.  

The best ways to find this are 1) See if your local NARPM (National Association of Residential Property Managers) has an attorney affiliate member. 2) Ask your local landlord and investor club members who they use. 3) If 1 and 2 are not options, go to your local court case lookup site and pull the cases for the third week of the month.

I'm putting solar panels on a new 4 plex build so I can pay all utilities under a single payment and make life easier for everybody as it is a medium term to short term rental.

.- Should I expect them to pay with a check or be willing to accept cash each month?