A fridge wasn't included in our appliance package either, it's not common for it to be included here on a fully complete home either. I've only seen it where it's a high end fridge which then of course is reflected in the purchase price.
What we ended up doing in our kitchen because we actually prefer black appliances is we ended up with leftover money in the appliance allowance and specifically put in the contract that we could float that money elsewhere. What we did with the leftover money was upgraded the main level bathroom lighting fixture. I agree $1K is not much at all for appliances if bought on your own especially these days. TBH the appliance package we had wouldn't have fully covered it back then if you wanted all stainless steel appliances. Although some of ours was eaten up even with black appliances because we wanted a gas range and stove (which we paid for a gas line in the kitchen).
I would check on some reasons why that other side may not be selling, things like site conditions, is the backyard much smaller for that townhome, etc. I could see being right by another neighborhood impacting that as well just thinking there could also be other reasons why they are more willing to nudge on the price and offer incentives for that particular side.
Hmm..from your list maybe the vinyl flooring you want in the bedrooms could be something to negotiate on, I'd still expect to pay an upgrade but maybe they'd be willing to knock a bit off that price.
Random thing we learned when you do an inspection I would suggest going around to the outlets especially if you have ones that are at an exterior wall (so front and back as well as sides if the unit is on the outer part). Our rental house we lived in in 2013-2014 had been built in 2006 by Pulte Homes (so it was a new enough house) and was not built the best. We had air coming through the outlet in the master bedroom as an example. We would have never thought to think about that until we experienced it. When we went to have our house built the builder for our house just does as a normal thing spray installation on the outlets which in part will help on energy efficiency. (Side note Pulte Homes left our metro during/after the Recession)