I disagree with asking your CPA what they like unless your Tax CPA is an expert in the same specific industry you are in. 

I bought 6 unit property in Wildwood,NJ,in November 2024, doing rehab now, should be done by May 2025I am planning to subdivide 6 unit building to 6 separate condos and sell fall 2026, , if there are any experts in 1031 that can help me?!

See the chart from Fair Isaac Company (FICO) below: FICO Score Pct of Population Default Probability 800 or more 13.00% 1.00% 750-799 27.00% 1.00% 700-749 18.00% 4.40% 650-699 15.00% 8.90% 600-649 12.00% 15.80% 550-599 8.00% 22.50% 500-549 5.00% 28.40% Less than 499 2.00% 41.00% Source: Fair Isaac CompanyAccording to this chart, investors should use corresponding vacancy+tenant-nonperformance factors of approximately 5% for Class A rentals, 10% for Class B and 20% for Class C.To address Class C payment challenges, many industry "experts" are now selling programs to newbie investors about how Section 8 tenants are the cure.

Remember, the notion of amassing wealth without investing is a dangerous myth perpetuated by self-proclaimed experts.

The seller can pay for it at closing (the title agent will cut the check to the trade to ensure there is no resulting lien) and provide proof of the replacement to the insurance provider.  

I believe if people make money and there is sufficient housing supply, housing will become affordable. 

you have most certainly come to the right place to sync up with other investors and learn more about their experiences and trade strategies. 

Day traders are not exempt unless they elect mark-to-market (MTM) accounting, which eliminates wash sale tracking but taxes gains as ordinary income.To manage taxes, track trades closely, avoid overlapping purchases, or consider MTM election if trading actively.

I am no expert by any means but I thought I would drop my opinion here. 1) Should I focus on duplex since they're most likely less expensive in my area in category A or B properties, or aim for more units?

I make no claim at being a tax lien expert, but most of the time anything that makes it to OTC is so picked over it is nothing you want or could get much if any value out of if you had to foreclose.