Am I still able to write an offer the buyer would be interested in?

Maybe your offer will be more attractive to others.I'm not poo-pooing your idea, but I am skeptical enough that I won't ask for an analysis of a particular market. 

I had walked the property and told him he was crazy for not making an offer.

If your lender offers the program they should be certified or trained in some way on the program and can answer any questions you have on it.

Would love to connect and get some insight into any ideas you may have for learning opportunities, networking, etc. in the Memphis area.

You should located a Commercial Broker in your area to pull Comps for you to determine your offer price. 

They often offer competitive pricing and have a wide selection.- Online retailers: Amazon and Wayfair are good for smaller items like hardware, as you've mentioned.

While continuing to do research, I have been sent emails and attended webinars where they offer paid mentorships.

Nonetheless, they offer a guarantee and I can’t see how it’s legal that they take away all services, websites, online portal when I haven’t even been refunded (it’s just being disputed) and claim they have a right to do that.

Technically 5+ units is commercial so many residential lenders won't offer financing in house..