You should have a price formula that you work off of. That makes it easy to just add up the numbers. Add in tracks, screens.
Also, estimate is contingent on verifying estimate once eyes are on the job. Because you may run into difficult ladder sets, paint debris, windows not quite as described (huge, more than told, stains, landscape from hell, etc.).
First off, since I’m the professional, I’m pretty sure I can tell whether or not a window tilts in.
Second, is that knowledge supposed to mean my job is now easier? Sometimes it is if it means I avoid a ladder, but it’s not like you’re getting a discount for it.