The current RP balance is displayed at the top of the screen to the right of the sesterces. RP's expenses should be used wisely as it takes time to earn and a lot of it is needed at higher levels to level up villagers. It is not advisable to spend RP on permanent outposts, Egyptian characters in the boxing ring or additional equipment slots at early levels, but focus on improving the villagers.
==This is how RPs are earned==
The palace generates up to 1,200 RP per day for 2 weeks when completed. If it needs to be repaired, it still generates a smaller amount of RP (10% of normal values).