2) What protective measures should I consider as a buyer in a seller-financed deal to ensure the offer is as efficient as possible?

After 20 years of buying and selling real estate this morning it occurred to me that if somebody offers to sell their house for let’s say $250,000 “as is” and you agree to pay that exact price with no contingencies, but other people are interested in the property , then that seller can just raise his price and not sell the property for the price “advertised”.

I work with many fresh grads and even an offer letter can get you a conventional mortgage.

Check out the guys Miliraty to Millionaire (https://www.frommilitarytomillionaire.com/)They have great content on their website and podcast for service members growing their wealth through REI. 

I've shifted my focus from textbooks to spending quality time with my dad, who hasn't been feeling well lately, and I'm aiming to build up some savings through investments.Now, I don't have a car, but I have a friend who works nights and has kindly offered to give me rides anywhere between 3am and 4pm.

It's just about having the right team in place where you can identify them and get offers submitted quickly and solid contractors that can give you realistic quotes so your financial forecasts are accurate. 

Something without a HOA is best.4) find a local group and go to some of their meetings (if you are buying locally)5) contact a realtor who works with investors and look at a few places after you've run the numbers and be prepared to put in offers and follow through

I would not offer internet.

We recently had a unique offer from an elderly care company to rent our home to operate their business out of.

To provide value to sellers by offering fair deals and facilitate transactions that benefit both parties.