You can exploit the llama races/fights. If you turn off auto save you can bet your money, and if you lose, just reload the game. It lets you have all the best pets/cheerleaders from the beginning and never run out of money.
A couple simple things, inventory space as suggested. Possibly a bank could help as well. Also, shortcuts would make it so much better. Make the skills and abilities number 1-8 and have a button to switch between the groups, as well as make you able to change the order of the skills. Also, put more into the pets. Give them comparable stats, and don't make every pet of the same monster the same. Make some sand beetles stronger then others, possibly determined by how long they hatched.