Never underestimate the value of a decent trailer park. No joke, in many cases you can rent with cash and no background check. Many people want to scoff at the notion of a trailer park, but my wife's side lived in one for 10 years to save money and now they have multiple properties for living and rentals. Where I live, a suitable house would run you some $1200 a month. A double wide trailer would be close to $400. At a trade off of what? pride? If I was suddenly young again, I'd do it without thinking twice.
To follow up on the notion, I checked craigslist in my area just to confirm and the deals look even better than what I mentioned above. 3 bedroom 2 bath trailers for $1,000 down and $300 a month. You can buy one outright for as low as $2500 and even decent ones with enough room for 4 can be bought for $18k.
You can also consider that people looking to buy trailers tend to be either retired with cash in hand or the exact opposite. Sellers may carry a loan or payment plan. They are used to negotiations on properties like this.
Don't forget that a trailer park does not necessarily mean some scary ghetto. Some of them are really nice and have very warm communities, even amenities. It is definitely worth checking a few out and asking the management what the lot fees are.