As far as the stock market goes your money is at significantly more risk than a savings account and it is very volatile in the short term however over long term (10+ years) low cost index funds have proved themselves reliable, unfortunately this isn't a feasible time frame if you are saving for a down payment in most cases.

I am by no means an expert but the skillet I'd use to find a reliable TK company are similar to what I'd use for finding the PM and the RE agent.  

You will want someone reliable and will get there on time.

. ** and yes: I don't know how you are arriving at 50k But go see it: based on comparable sales arrive at an ARV (after repair value): then get the estimated rehab cost from a reliable contractor: Then get the ARV $: times 65% : that will give you X: minus repair cost : and that will equal your offer priceFor example: ARV is $100k : times 65% : or 65k minus 20k in renovations: so your offer will be: $45k You can't lose with this formula. 

If you can find the right land at the right price and also reasonably priced reliable building contractor (many are busy now), your preferred build to rent approach can be an interesting option.Scott

The toughest part about investing out of state is finding reliable, honest property managers.

Are there reliable contractors in the area? 

Unfortunately, one has to go through many people to find reliable people with a sense of urgency and the same motivation.

How do you find low cost and reliable workers?

He's been a great and reliable partner in my business.