We did our design process last month.
Appliances: We were told that they wouldn't leave the wall oven or cooktop hole empty. So we bought the cooktop, wall oven/microwave combo and dishwasher from them. Refrigerator and washer/dryer on our own. As to where to buy? We bought at Appliance Direct. But look around at Best Buy also. It might come down to who actually has inventory. Order early if buying on your own.
Crown Molding: We'll be using Creative Finish Carpentry after we close.
Creative Finish Carpentry – Central Florida's Crown Moulding Specialists
Closets: We went with the builder wire for now. Will upgrade myself after we move in.
Ceiling Fans: We went with the builder white without even thinking about it. Dan's Fan City is a good source as is Lowes. Amazon if you can install yourself. We will probably upgrade the Master bedroom and Living room right away and the lanai later.
https://www.dansfancity.com/dans-fan-city-leesburg
Attic Stairs: If you're looking for motorized stairs Majic Stairs look great.
Majic Stairs | Push Button Motorized Retractable Stairs
Blinds: We had the builder put blinds on our master bedroom window only. We will do shutters when we move in. We're looking at Blinds Plus Shutters but haven't decided yet.
Blinds Plus Shutters & Shades - The Best Blinds, Shades, And Shutters In Central Florida
Light Tubes: We are waiting until we move in to evaluate if we need tubes. If so we'll be going with The Solar Guys.
The Solar Guys: The Villages & Central FL - Solatube(R) Skylight Experts
Security: Haven't made up our minds yet. Might just do Simply Safe on our own.
Smart Home: Not yet sure what we're doing but Villager Audio Video seems to be the go to guy.
https://villagerav.com/
Air Conditioning: We went with their single unit upgraded system. It comes with an Ecobee smart thermostat.
Water Heater: We upgraded to a recirculating tankless water heater. The unit itself has the recirculation pump. They run a return line back to the unit from the farthest faucet.
Water Filter: You arrange direct with Nova. Get on their list early.
https://novafilters.com/
Entertainment system: We ordered furniture from Babettes. Not sure if they have anything big enough for an 85" though. Ours is for a 70". We haven't bought our equipment yet but will probably just go to Best Buy.
Hope this helps.