DSCR would be your best bet but again 25% down and a DSCR of 1.25% minimum.Do yourself a favor and do not let just any Lender/loan officer pull your credit just so they can take an application and have a possible deal.

Best of luck!

There's a very good chance the issue(s) you face have already been discussed and answered.Ask questions in the appropriate forum.

With ADU Geeks he worked all over San Diego so I would be very surprised if he hasn't worked in La Mesa.HELOC is always the most firm route - I have recently learned of some solar companies funding home improvement loans that I am looking into myself.  

Really the best thing would be to get your CPA coach you on what exactly they want.BTW, the advice given to you on this thread by a lender and an investor is wrong.

On the one hand, I realize I just need to let time do it's magic and enjoy appreciation and debt paydown, but I'm looking for ways to continually grow my portfolio by either acquiring more properties or finding ways to generate more income which will be used to purchase more properties.I tried using OPM but that doesn't work for me for several reasons - if I go down a loan route I can't pay it back because of my LTV cap and partnering for equity requires a lot of work in bulding trust and even then it's for a very small share of equity which is insignificant.

Thank you very much in advance. 

I am undecided on if I long, medium-, or short-term rental is the best for me.

Best value at selling is to remove the JADU due to poor auction the result of mostly needing a house hacker   In addition, if you already have a regularSDU (which would be primary reason to add JADU over an ADU), the property by rule does not qualify for conventional financing.  

Condotel's can be very specific to finance.