Technically Not BURNED OUT but frustrated and miffed!

As some of you know I am my mothers POA and pretty much the only 2 people she see's and talks to are myself and my husband.
My mom is still able to live in a tiny senior govt subsidized apt for now and it is small. Basically an efficiency with bathoom and tiny kitchen. This is more than enough space for mom but for months now she has been saying she wanted a twin bed. She said it was to hard to make her queen bed and that it was old and her back bothered her and so on. Anyway for weeks she would ask and I would have to put her off because we needed my husband to p/u a new bed and take away the old bed so we were at a stand still.
Well....last week end I accidentally came across a cute day bed (twin) at a great price and sweet talked the hubby into taking time out of his work, we purchased it, took it to her home, took apart the queen and leaned it against a wall because we wanted to donate the old bed and they were closed for the day and I also never trust my mom to stick to a decision. We told her we would be back this weekend and pick the old set up and finish out the rearranging.
Well true to my moms nature by Tuesday she has already decided she doesn't like or want the twin bed and wants her queen bed back. So now I need to get my husband to give up more time and put everythng back together. I also have to return 100.00 worth of bedding back to Walmart (thank goodness I hadn't given it to her yet) so there goes another day of a highly cherished weekend for us.
I don't really begrudge my mom the time I give but it really does burn me when we totally waste time and money!
On top of that when she is telling me she would like her queen bed back she says, WELL I WISH YOU HAD ASKED ME! LOL, she had bugged me about it for 2 months!
I just needed to vent a little. I will be fine.