Creat Random List

I need to create a file with random purchase list that have some restrictions.
I’ve been working on this file for few days, but I couldn’t get desirable results.
Attached a sample file that describes what I did. It build up as the final file (just the final file has many more items).

I’ll try to explain what I need and how it works:
There are 4 categories: Theater, Salon, Kitchen & garden.
I need to create random lists of purchases (each list should be a line at the total sheet)
there is budget limitation of $100000. Each category has minimum items that must be purchase (headlines are in red color, total of 9 items).

The minimum items that can be on one list are 11 (9 red columns & another 2 random columns). Maximum are 15 items (9 + 6). Same item shouldn’t appear twice at the same list.
This file chooses randomly 19 items and check if the list stands up the budget.

There are 3 issues that I couldn’t solve by myself:

1.I should define the file to stay within minimum & maximum items per list (11-15)
2.Make sure it doesn’t go over the budget
3.Stabilize the list the values will not change each time I’m doing changes to file