Brother is mad at Groom and i

Here's the case. Fiance and I are eloping to Vegas, we wanted a low cost wedding with some frills: dress, tux... just us saying our I do's and tying the knot, signing our papers. Simple, right? Apparently not.
Well we had told our friends and family, if you can make it out, feel free to join the celebration, if not, we will stream the ceremony 24 hours later. My brother, a very close member of my family and one of my best friends was so excited to go. Then I told him we will NOT be paying for your flight or hotel. He said he couldn't make it. Okay. Then my fiance's parents have decided they may as well do a week in Vegas and be there for our wedding. Awesome! I love my fiance's family. So now my fiance and I have talked, it is only fair that my mother (who raised me single-handedly), should join in the celebration. My mom is a mess (putting it lightly) and really affects my life. If I am not dealing with her housework, I am hauling her to the store, doctors appointments, cleaning her house, repairing her house... it's a mess. And it consumes a great deal of my time. I have even forced her to find another form of transportation, at one point caring for her and my brother at the same time. I was really worn thin. So we are paying out of pocket for her flight and hotel. We are trying to find a way to get my mom transportation to and from the airport and to and from the venue. My VERY pregnant sister tells me she is unable to help. I get it! She will have a newborn by the time of our wedding.

Later my brother tells me that my mom shouldn't come to my wedding, and that he wouldn't since my fiance and I are being selfish. He was also recently in a wedding (missed the rehearsal, due to himself) and explained that he felt "SO honored" to be in his friends wedding and how they were SO kind to him, and they gave him gifts, and that we are so selfish... we aren't having a lavish wedding. He knew this from the get go.

We only anticipated about 5 people being there, but have way more than we imagined coming. Am I allowed to be angry with my brother? Even now, he is sending me angry messages about things I don't do (regarding our mother), and I haven't responded. Does he just seem jealous? I'm not sure what to think and am so mad at him about his comments, I am thinking of blocking his number. Any other brides had or have this ordeal? I am very hurt by his words and angry. I have even thought about telling him not to text me and not look at our ceremony video. But don't want to fuel his fire. Please help.