Check Craigslist. I got several things off of there.... sinks, stove, hood, lights, faucet, dishwasher, fridge... wow just about everything now that I think about it.
I got a great deal on a viking stove, for example, because I had to take it apart and clean it up pretty good.
I like having a basic stove with no $500 control panel that will go bad
Black Friday is coming up so start thinking about what you want and what a good deal would be. Best Buy has appliances and often has sales. As does Home Depot and Lowe's.
and don't forget those big online stores that ship free and have great deals:
aj madison, goedekers to name a few.
the fridge we initially got used lasted 5 years but was always a bit rough. I finally bit the bullet and bought a new one from goedekers and am happy. Shipping took a bit longer than it should have but it was free shipping and no sales tax. The tax thing might be different now though.
our microwave drawer (we love ours... but there was no way in the world I was gonna spend full price on one) came from Sears' outlet center as a display item for 75% off
I was not going to pay $300 for each end panel of the cabinets (4 needed) so I got some rough fence planks, stained them and put them on the ends. If your style is more fancy than industrial, you could get some nice wood and make the pieces.
also, consider running any wires for ceiling speakers or Wi-Fi or outdoor lights/cameras/receptacles. The walls will be open so adding stuff outside is easy now
I put our cabinets pretty high above our cabinets so we would have plenty of room to use a blender underneath and take the lid off and on. Some cabinets are so low you can't fit them under
get a quiet (read: expensive) garbage disposal Ours is so quiet it was on and I didn't even realize it
overall, It's not gonna be cheap but buy once cry once.
this is what a lot of Craigslist finds looks like:
but if you go that route, focus on the most expensive items. It takes as much time and effort to find, arrange, and go get the vent that saved you $700 as it does to get the sink that saved you $60.