Focus on building a network of contractors for repairs, set clear boundaries for house hacking, and take advantage of tax benefits.

Tax Benefits are also a result of time, good bookkeeping, and tax advisory.- Market Appreciation is the least predictable, but historically, where you will make the most money.

At this stage I do not know if responsibility for necessary termite infestation treatment is determined purely by the articles of association and other incorporation documents of the HOA or are the HOA directors in direct breach of any Broward County, Florida State or Federal laws in not doing anything about the ( apparently widespread ) termite problem in the community ?

FHA does have the benefit of max seller concessions being 6% so if your realtor can negotiate for that it can really minimize your cash outlay. 

However, the loan could still impact her indirectly.

The stodgy that most of the investors that I work with use is to make sure that every 1-2 years they look at their portfolio and capture the equity to help grow their wealth.As a benefit for the investors that I work with we have partnered with a company that we met at BPCON that looks at this exact thing.

You will get some cash flow, appreciation, and tax benefits along the way.

The preliminary analysis can have lots of data, so it's important that the provider thoroughly review it with you to explain what depreciation tax deductions Cost Seg study provides and what depreciation benefit you would get w/o Cost Seg.

Self-managing the STR has some great tax benefits if you meet IRS requirements.  

As mentioned the main downside to using a SDIRA to purchase properties is you get no tax benefit upside (depreciation) and have to pay taxes on UDFI.