The idea is to not "wake sleeping dogs" and while at the same time not having issue on my next purchase. 

@Mayank JainDo you have a W2 job or do you own a business that is not involved in real estate?

Talk with other investors in your situation to get some ideas. 

Here's what I am thinking: if I CAN buy the property, ask for him to sell it to me for a lower price (like 350k -- that way he gets 100k) but then doing a prom note with him for an additional 50k by pulling out equity and paying him around a year later.Do you think this idea is smart or doable? 

Almost any business you look at has its own gurus and scammers.

Good morning BP community,I'm a returning REI in East Tennessee who is now investing and buidling a family business full time after a career in the military.

3: I have no idea how to determine how much to borrow verses pay cash?

The reason why many lenders shy away from Manufactured Homes In general, is because there is not a lot of business for it for them to feel comfortable lending on it.

After time you can start finding them on your own after you learn more about the business. 

I left my job 2 years ago to help me and sister build a online business.