With putting that many miles on your car a week, it would be a definite money saver to change your own oil. Changing your oil isn't that hard, but if you mess up, it could be catastrophic.
Tools you need or make the job easier:
-Rhino Ramps are $30 and have a 12,000 lbs capacity. These are also low profile so you can get semi-lowered vehicles up on the ramps. Most ramps and just about all jacks and stands will work, this is just my preferred method. I say a 2-ton jack and stands would be the minimum safe zone for a jack, IMHO.
-Filter wrench or sockets. I like the filter sockets. These are like $3 a piece and I have 4 of them to fit all types of oil filters. A 3/8" ratchet fits the filter socket to make loosening the filter a cinch.
-3/8" ratchet and 14mm socket, IIRC. I prefer 6-point sockets to prevent rounding the head of the drain plug.
-1/2" ratchet and 14mm socket could be necessary for really tight drain bolts. Or 1/2" or 3/8" breaker bar.
-Torque wrench for drain bolt insertion, or do what 90% of us do, snug it up with 3/8" ratchet or 14mm wrench. Don't over tighten this, just snug it up.
-Hand tighten the oil filter. I weigh 150 lbs. and usually tighten it as tight as I can get it by hand. Don't use a filter wrench. Make sure when you take the old oil filter off that the old filter gasket comes with it. Use fresh oil to lubricate the new oil filter's rubber gasket. Also, shake the new oil filter to make sure nothing is in it that would rattle. If it rattles take it back b/c whatever that's rattling will more than likely hurt your engine.
-Hot oil drains better and more efficiently than cold oil. I've never had oil burn me, but watch out for the exhaust components. And, when draining the oil, have the oil filler cap off. This allows the oil to drain faster.
-And, of course, something to drain the oil in. I like something big so I can change multiple vehicles oil w/o having to drain it each time. I think the one I have is a 15 qt. Blitz drain pan that cost about $7 at Advance or Wal-Mart.
I'm sure others will pitch in their helpful hints. Good luck and hope this helps.