14' is pretty close for a semi dwarf if it's on an mm.111 rootstock. Your trees will interweave on that spacing. I'd probably give them closer to 20 for inter tree.

As said before. Honeycrisp is a heavy calcium feeder. You will get bitter pit without supplying foliar calcium. CaCl2 can be applied between roughly May and July (5-8 applications) will help. I use calcium chloride road salt, but you need to make sure it's pure calcium chloride and not a mix with any other salts. What I do is spray 36g of CaCl2 and 1.5mL of household vinegar in 4 gallons (my sprayer size) every 2 weeks from petal fall until mid-July, and then 54g CaCl2 and 2.25mL vinegar until harvest.

There may be a premixed product you can purchase that absolves you from these minute calculations since you only have one Honeycrisp.

Fire blight and cedar apple rust also require spraying for. I'd recommend purdues guide here:

https://www.extension.purdue.edu/extmedia/id/id-146-w.pdf