Plastic trays are fine for prints. And if you ever want to get into toning, you don't want stainless steel. Get colored trays so you can use the same tray for the same chemical. Good trays should not have flat bottom; there should be ridges to add agitation during processing. Plastic tongs are fine as well.
If you water supply is a fairly consistant temperature, then develop based on the temperature. Trying to keep chemicals to a specific temperature that your situation does not allow can drive you nuts.
I always liked Ilford paper over Kodak. Ilford is a fine product.
If you can swing, get a medium-format enlarger or 4x5 enlarger. They are steadier and taller then their 35mm cousins and if you ever head to larger formats you are all set (except for the negative carrier). The enlarger lens is important as mentioned above. Get current lenses as they are significantly better then old style lenses (but don't look as nice). Nikkor EL are good lenses. Both Schneider and Rodenstock make excellent lenses, but they have a entry-level line - Rogonar for Rodenstock, I don't remember Schnider's economy line. A good enlarge lines should be a 6-element design, not 4.
Recommended enlarger manufacturers - Omega, Bessler, and Saunders/LPL. Enlargers are simple machines and what is important is alignment and sturdiness. The enlarger lens is where the fine optics need to be.
If you like to print a black line around you photos, you will need a full-frame 35mm carrier. A normal carrier crops in slightly. I perfer glassless carriers. Glass carriers come with a host of problems and the glassless carrier should hold the film flat.
I see no practical benefit to 4-bladed easels. Two blades are good enough and cheaper.
Peak grain focusers are good, whether is is the top or bottom of the line - they work equally well. I tape a piece of the photo paper I am working with to the base rather than always sliding in a sheet every time I focus. And no, you cannot really focus an enlarger without a grain focuser.
I use simple sheet of heavy glass (with rounded edges) as a contact printer. I always found the complicated contact easels a pain. I contact the film is the film storage sheets so I have less of a chance of damaging the film - and it is faster. Put a carrier in your enlarger and focus the carrier frame on the baseboard so it covers the contacting area - focusing the enlarger gurantees the area is evenly illuminated. Then take the carrier out and start contacting. For contacting, once I have the basic exposure, I will print 10 or 20 contacts and then develop the paper in a batch. Depending on the size of the tray, I develop the sheets back to back and separate them in the stop and finish the process.
BTW, one way to lessen the chemicals in the air is to use a rigid clear plastic sheet (plexiglass) over the trays. Just lift the plastic to add or remove a print. And air born chemistry will disolve itself in any drinks in the darkroom so keep your coffee in the kitchen.
Anyway, I am just spouting random thought of the darkroom now.