@Truong Vu You have some valid concerns, but most investments, whether for your personal use or long term holding property is usually about leveraging what you have. You don't really mention investing in real estate, so this is just a purchase for your personal use.
I'm in the Orlando market and it is definately softening now and favors buyers. Alhtough values continue to appreciate, home prices are coming down as competition gets heated with more homes on the market. You can negotiate pretty well right now and we'll see what the next two months bring with the Fed meeting again and the election.
In my opinion, you should probably not put all 50% down. Use less of that and either get the seller to buy down your interest rate or you can do it and have a comfortable mortgage payment and still plenty left for your emergency fund. If the economy gets better, you might be able to refinance and/or if you make more money, pay down the principal later if that is what you really want. Rates are high now, but if they go down, more buyers will enter the market and drive prices back up. So now is a good time to buy if you leverage your ability to put a good amount down and close...that is attractive to sellers that are eager to get out of their property.
I hope this helps, best of luck to you! Reach out if I can help in any other way.