I have a few questions in how to start the offer/negotiation and listed the basic details of the property below.How would you structure a seller-financed deal?

TSP is a great resource, because it’s considered cash in the eyes of a lender.  

Just be careful and go in eyes wide open and run your numbers.

Thanks for the post and thread, they are eye-opening and entertaining even.

Based on the details above, we would love to understand people's point of views on if this is a good deal or not and/or something that we should undertake. 

Your question is just too broad to get a more detail answer IMHO. 

Shoot me an email with some more details.

If I waited until end of 2019, I could afford more.I will message you for the lender's details.

I might of got a little confused now that I read @Nicholas Horsburgh his reply he did not say PPM he said offering memorandum .. many would take that as a PPM  ( private placement memorandum) but maybe he meant like a detailed description in writing of what your trying to accomplish.Generally there are no real contracts for loans there are loan documents though Note  mortgage settlement statement and depending on the lender a whole host of other various and sundry documents usually disclosures so you can't sue the lender. :)

Good for you that your taking the plunge into this big, detailed world of real estate!