You need to do a proper calculation lor, there are a lot of hidden fees
- Buyer stamp duty ~ 3-4% or more of the property price
- Resale levy, up to 45k depending on what kind of BTO you got
- I'm assuming your current house still under mortgage and you won't be able to do normal payment for the new EC, taking up DPS is 3% (or more)
- Selling the house HDB, engaging agent is 1-2%
- Misc fee and renovation ~ 40-50k
Since you're buying around your area, that means you will be locked in the same location for a good 8-10 years at least, which is probably what you want anyways, so its just a choice between staying put, selling and buying a resale, or going for EC.
I think you need to consider what is important for you lo, is it convenience, e.g staying back the same area, moving to a new place for the kids, realizing the condo dreams, bigger space, amenities or what. Selling a 4rm 1012 sqft HDB to buy a 947 sqft harmonized 3 bedroom isn't exactly an upgrade (for me), the newer harmonized ECs kitchen is smaller, living room is smaller too (compared to HDBs), I'll be thinking how to match my current place to my new place, if i have to dump stuff and live a minimalist lifestyle its not exactly an upgrade even though i get a swimming pool and 4 walls around the condo.