1. 100% can delay 90 days. If you email
[email protected] then they may work with you depending on your situation. The bill proposed is only for EVs less than $80,000. Also as written Teslas under $80,000 purchased after May 24, 2021 will retroactively qualify for a $7,500 non-refundable tax credit.
2. If the price goes down, you need to actively ask either your SA or
[email protected] to adjust your order due to the price decrease and they will honor it. No, anytime before delivery if the price goes down and you ask to adjust your order, then they will honor it. And it doesn't matter how long your order has been on hold. There are some people who have had orders on hold for over a year and they have reduced their price. However, you get the current prices for all added options so keep that in mind. If wheels or FSD goes up, make sure you take that into account for base price going down. In addition, if you change the color or any options except adding FSD, then you change your order to all current prices.
Tesla is getting more strict with their hold policy. It used to be officially in the terms and agreements as 6 months, but people were getting 1-2+ years on holds. Now it is officially 90 days, but people are still getting hold longer than that, not sure what they actually max "allow".