Probably the safest option and limit the risk involved.

Fulls are not a good option for a STR, either do kings or queens.

Here are a few ideas:- HELOC: depending on how much equity you have in your property, you may be able to apply for and borrow against that equity- DSCR: BP now has a find a lender link and I'm happy to recommend mine as well if you'd like; there are lenders who do loans based on the future rental value of the property- Borrow from your 401k: typically you're able to borrow up to $50k and if you have multiple 401ks, borrow from multiplesHopefully this gives you some ideas of other options to bring in some cash for your investment!

There are also some good options just outside the Lake Tahoe basin that can offer year round recreation and 20 minutes to ski areas.

HELOC is always going to be the most flexible and inexpensive option. 

I noticed that many positions request experience with Yardi or similar software, and I want to get my resume noticed.

The other option is that you do everything yourself.

You definitely have some options, if you do a more conventional second you can get very reasonable rates, maybe check in with you current bank or credit union? 

Even with general security agreement, you would still stack behind any lienholders who are already secured and perfected or even who have secured positions on any personal assets. 

I'm in a different position in life where cash flow is not as important that equity capture.