There is no need to worry about the purchase money anymore.
1) After entering the match, you need to open the console. The default key binding for the console is the tilde key (~).
Can't open the console? Look: How to enable and open the console in CS:GO
2) You need to activate cheat mode. Enter the command - sv_cheats 1
mp_startmoney 16000 - exposes the initial amount of money.
mp_buytime 99999 - changes the purchase time (in seconds).
mp_buy_anywhere 1 - disables the restriction on the range of the store.
* Adapted for the latest version of CS:GO.
No installation required.
IF THERE IS A PROBLEM:
Opening it this link, we read it, if necessary - write the name of the mod.