all season tires and wheel alignment in New mexico

[wigner]

The inside (shoulder) of driver side rear tire worn down and is already bald but passenger side is not so much bald, 1.5mm? thread is still there. And I learned from this forum it is due to the negative camber. so I am considering Michelin latitude Tour Hp for my next. so I have a few questions.

1. Can I keep the old diamaris for a while, say for this summer? I mean if I keep driving under 70mph, Is it safe? maybe stupid question but other tires especially front tires are very ok but I am thinking changing all together is better in this winter with all season tires.

2. I found that latitude tour HP (all season) has specs of revolutions per mile says
front 255/50 19 --> 720 and rear 285/45 19 -->711. this spec is pretty much different from the original diamaris. (2004 X5 4.4i sport pack so x drive). so is it OK to install this tires?
any recomendation for the most durable all season tires?

3. Any recommend for alignment shop in new mexico area, alberquerque? or should I go to dealership? I really do not want to waste money for tires any more. the dealer is asking $280 for just alignment. I think it is too expensive.

Thank you and have a good day.