First and foremost, buying more than one property at tax auction is advisable to help you unload those that may have liability issues. 

Some numbers below for reference: I currently am taking home about 140,000 pre-tax.

I know how much my property taxes will be, but what other expenses are there, and approximate cost? 

The biggest advantage of using someone local to where you're buying is that they will understand taxes, insurance, and similar items very well when it comes to DTI/DSCR calculations and payment quotes, and they will likely have a local network of service providers for ancillary services (survey, inspections, etc).

After he teamed up with a local intermediary in the Bay Area.. from what I read in the Wall Street Journal, Lockton has been helping investors streamline these moves.. he ended up freeing enough capital to invest in a mixed-use building in San Antonio that we’d been eyeing for a while.I’m no attorney or CPA, so I’m not giving legal or tax advice here, but there’s definitely something to be said for repositioning your insurance to fit your broader investment goals.

You will truly be raising the clock, as each day will cost you very significant money.  12% interest on $250k is $2500/mo, or about $80 per day in interest, not including your other carrying costs (utilities, property taxes, insurance, HOA). 

A good real estate accountant can save you thousands of dollars by leveraging entity selection and formation, tax deductions, cost segregations, bonus depreciation and tax planning.I recommend finding an accountant who specializes in real estate taxation, business taxation, financial planning and tax planning.You may want to consider working with your accountant remotely to expand your options.I would also recommend looking for a accountant willing to work with you throughout the year.

Saw it in 2020 and its happening all over again for different reasonsI have invested in the areas myself and plan more in 2025 to take advantage of the huge tax benifits to come.

While they are beautiful and get you top dollar, many come with tax abatement that expire in 5 years and will significantly reduce your cash flow once expired. 

The low income versus high cost of living is referred to locally as the sunshine tax. https://www.businessinsider.com/most-expensive-places-to-liv...https://www.census.gov/quickfacts/fact/table/sandiegocitycal...It is my view that the incomes cannot sustain the high cost of housing in San Diego but it has seemed this way to me for four decades and yet the RE prices keep increasing.