During the year you need to save all pocket change and $50. per month for TBA ----this is budget you will work from.

Wait until next year when you will be paying $10.00 for one gallon of gas. You will need ride up with Tesla buddy, have all the dudes rent a short term rental within in Helotes, have all the females shack up in another Short Term Rental in Helotes or another nice area and they ride to the convention with other Tesla/Rivian driver AND will need to find a Tesla or Rivian driver... Spend a few bucks at local burger joint that can tell you where the beef came from. Eat there 2 more days to keep it safe,
From the above Budget you should have enough to split funds with at least 3 or 4 other persons for the Short-Term- Rentals. Decide how much you will pay the driver who brought their electric car. You should have enough funds for the convention fee. You should also have a remaing balance that shouls be carried over to the following year.

Save the same amount for the second year and try to fine 3 friends of the same gender and repeat.