A 4-bed, 3-bath rambler with a large lot in a high-demand area is bound to attract buyers.

Seller financing is also quite attractive, though I guess there are few of these kinds of deals available. 

All Landlords risk tenants damaging the home, but a NICE home attracts NICE tenants so the fact that you've made the home very NICE means you should be able to take your pick of applicants.

Are they located in a touristy area or near attractions?

Now, either I'm not posting in the right places of i.e Cragslist / BP etc or my ads aren't as well constructed as I think they would be to attract motivated sellers.

THE attractive feature to me of MHP is renting the lots, not renting homes.   

Saying things to young ladies in their early 20's like, you have an f'ed up mindset.

The property has an amazing creek canyon (attached photo) is 5 miles from all the major attractions to Yosemite, and 7 miles from a lake.

Common syndicator game of throwing out huge returns when other funds are going under because they want you to only look at that shiny number and not what their past performance has been@Chris Seveney 25.7% Annualized Return / 21.7% IRR.This was my first passive investment and yes I was under educated, naive and attracted by the expressed returns. 

My guess is it's not the business of this little old lady he's renting from.