Property inspection - Advised against lead/asbestos test?

[Logan Loughmiller]

I'm in contract (in Oregon) on a house that was built in 1950 and have been advised by another local investor to NOT get a lead and asbestos inspection. That due to the age, you should just assume leads in there and probably asbestos. And once it's been documented it has to be disclosed at the next resale.

My main questions are - 

If I do want it tested for lead and asbestos in the inspection, would that be something my mortgage company would require to be fixed to close the sale? If so, would it be better to just test on my own if I want to after closing?

If I did test, would it be reasonable to expect the seller to compensate for some of removal costs? Due to the age and it's assumed content, I didn't know if it would be reasonable. Let alone how competitive the market is here, they could just find another buyer.

My big concern is that the property doesn't have central air and I would be installing that with ducts going through the attic (no crawlspace) immediately during the first month after closing. Wouldn't I have to have it inspected before that anyways or can companies work within those confines safely and legally?

At some point down the road, I would like to be able to do some bigger renovations, but the HVAC is the only immediate pressing thing.

Unit specifics: 2/1 SFH, about 750SqFt. Will be used as an Airbnb short term rental.

Any help greatly appreciated!