@jespah,
Terrific advice jes.
Yeah, I couldn't figure out how the OP is justifying spending close to $1000 a month (for how long?) on a sports car for mom, while living in a small apartment and trying to save up for a mortgage.
Mom obviously wasn't that impressed with the gift, as she refused it. Perhaps a less expensive, less maintenance, run around town car, that anyone in the family could use, would be more appropriate.
Re retiring and staying in the house.
Retirement is a life changer. Staying in or close to home for awhile (2 weeks isn't long) can be wonderful. Sleeping, decompressing, in general just looking at who you are, and having the time to do it, is wonderful.
Gifts are unconditional, and also should be geared to what the receiver would want, not the giver.
That's all I got.