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
I’ll really appreciate who ever can help me with those issues. If someone thinks he has other way that gives me same result it will also be great.