Unfortunately the barrier for entry into a lower-end home is about $1 million now, and property taxes are low (likely less than $5k).I currently have a financed home with about ~250k in equity (2% interest rate), and we have about ~220k in cash. 

Multiple billion dollar companies are investing into our area, such as Intel, Google, and Amazon, due to reasons such as lower costs on land, great tax abatement opportunities, and an attractive cost of living for employees. 

Quick question, I’m in California and will have a sizable, capital gains tax bill owed to the IRS and the state of California in the near future. my question is how quickly does the capital gains tax liability need to be paid?

What I would encourage you to do is to compare how much cash you currently have invested out of pocket in the deal and also calculate what the cash flow is for that property.Cash flow is the income (rent) minus all expenses: mortgage payment (including principal, interest, taxes and insurance), average maintenance costs, capital expenses (new roof, hvac, water heater.

Land is so cheap that if you do end up buying a large tract taxes are really cheap and you could build your own portfolio of land in areas you desire. - Double closings/Assignments - As the land market is getting saturated with other investors.

If you have been working on it but not listed anywhere, you can't deduct any expenses until next tax cycle.Also, I would highly suggest you get yourself a CPA that can help you.

My situation is that I wonder if I can use being a real estate agent as a strategy to save on taxes by creating a solo 401k.

Sarah's a qualified Accountant and has always dealt with our tax affairs, in the US and in the UK, so it makes total sense for us to take back control...

Also, for the taxes did you have to file state tax returns in all the states where there are mobile home parks that is for the ODC fund?

I am not opposed to flipping, but I need to educate myself on the tax implications first.