So I get 15-20 leads for each booking on Furnished Finder, which is a PITA because of all the manual follow-up and manual paperwork required vs AirBnB and others with instant booking and streamlined tenant approvals/p...

You can be sure they will continue to negotiate for, strategize and advise themselves.If the laws are similar where you are, you should consider if you want someone doing those things for you, and whether you are comfortable going toe-to-toe alone with a licensed professional on a $1.25 million purchase.

It worked out fine, though each time I got a little less than advertised interest rate (about 9% vs 10%) and I had to send a reminder email to to get my money back, but I did get it back.I ask about others' experience, because I'm still not 100% sure it's not a ponzi. 

It is a freehold property, recently renovated from top to toe with high quality, large garden, and kept very clean at all times.

You looked past a red flag right at the outset:"When application was made tenant was I am not going to to have my puppy with me so do not need pet fee or application"Total red flag.

There's more nuance to to it for sure but this is a good overview.

Look up your local laws on how much notice you have to give to to end tenancy and then give them that notice.

I work at my brothers business as a independent contractor ,  he has an accountant for this business is necessary for him to to this job or i can do it myself.

I was able to to skip trace his email, address, and phone number. 

Even if you just use to to place a new tenant.