I know they bought that property based on analysis, but don't know the market or area.I'll bet there is all kind of opportunity where you live. 

If there’s any way I can support you, feel free to reach out!

I also tried contacting support twice, and both times they only provide a link to the book in the store without addressing any portion of the inquiry. 

Too much bad debt 😅 kind of a joke3.

Is there any evidence or support I can include to make my letter of intent more credible?

Had turnover and the new tenant can't get service because they say theyre not providing that kind of service any more.

It's kind of funny, some owners are thinking that simply because they have a house, that a investor is just going to pay near fully price, and its like, why not list?

If you were able to pull out $500,000 in existing equity out of a paid off rental and disperse those funds to acquire 2, 4-unit MFR properties and had the income to support any future CapEx and the interest payments on your HELOC ( including the extra income to paydown the loan ) would there be any " gaps " or problems I'm missing in this situation where it would be a bad enough idea to not go through with acquiring more properties through a HELOC on 1 of 5 properties you own?

"What other Realtor can offer you these kinds of solutions?" 

2 - What kind of loan do you have one the 2 SF right now?