Paint Box
Cleaning area/Box/Tray
Heating
Ventilation
Fire equipment
Spotlights

Air compressor, useful for running tools and cleaning stuff.

Joking aside a sink is a good idea for washing oily hands with swarfega! Saves countless tellings off!

Our wireless internet works in my garage and I have an old laptop in there which is great for the radio and looking up workshop manuals or just general google problem solving. And pron.

Kettle
biscuits
pipe bender
scantly clad ladies calender (a must)

I would want a 5 Axis CNC milling machine, I have no idea who much they cost but they have to be the coolest tool in the world and probably the most usefull

Calipers, Micrometer(s), Dial Indicator + stand
As it's aluminium buy one of those bulk WD40 containers it's an excellent coolant/lubricant
Someone mentioned a compressor - would be useful and you could use it for mist or just air blast cooling on the mill
You may not need a bandsaw and could compromise with a cut-off/chop saw if you're just using it for cutting stock to length
For the mill you're going to need a proper vice, some parallels and don't underestimate the cost of tooling

Which mill and drill are you looking at?

There's nothing particularly wrong with Sealey, Draper and Clarke but I'd stay away from them for machine tools. Stuff like the compressor, basic tools etc they're ok for

Can we see the part(s) you're going to make?

Some initial selections:

Here’s the drill

Bench grinder

Band Saw
Not sure if the available bands have a fine enough cut though, need something that can cut 1.6mm plate and 1.2 – 1.6mm wall tube without stripping teeth and 24tpi isn’t fine enough if memory serves.

Mill As this doubles as a drill, could be a good bet. Only need to do 10mm and 12mm slots, drilling 4mm to 20mm

Bench folder

In terms of handtools I’ve got a fairly decent set inc. micrometers, but I will need some files, an marking gauge and a bucket of blue! Clarke MIG welder I’ve already got, angle grinder and hand drills. I’ll even treat myself to a spanking new vice

Its all metalwork – I’m no good with wood

Its all tube and sheet fabrication – and I’ve found the biggest cost isn’t the materials, it’s the finishing. Powder coating is OK, still more than I was expecting but chrome plating is comparatively bloody expensive (this could be ‘cos I only asked for one-offs for a couple of prototypes, hoping it’ll be a lot cheaper for larger batches).

First aid kit

That'll be SWMBO (ex-nurse an all that...)

I'd spend a bit more on the pillar drill. Cheap ones have poor bearings and skate on metal rather than cut where you want them to.