I need to d-bore in power to my shop. it's 450' from panel at shop to transformer. I'm going 200 amp service, I've ben told 250/350 mcm or 4 ot, I want to go underground ALuminum,, I'll go broke using copper.. or is there something else I should use...

I'll be running 16 high bay lights, welder and air compressor, ceiling fans and garage door openers,,,, think thats it!!!!