Depending on the affordable cost, you can choose these options for accommodation in Ljubljana:
more expensive from 100 EUR in local hotels;
frugal from 9 EUR in hostels.
Hostels minimize the cost of living in Ljubljana - you can rent a bunk (in a room for 6, 8 or 11 people) or a double room (from 25 EUR per day) inexpensively.
Another budget option is to rent an apartment. For example, you can choose a studio apartment with bathroom and kitchen for two people from 350 EUR per week.
Prices for accommodation in Ljubljana depend on location, conditions and season.