Well the shop i buy from is dealing with fillement with the cost of about 20 euro de Kilo, So 5 kilo of fillement with 100 euros.
(Well the shop i buy from, is kinda cheap, but most fillement is in America cheaper so it will be aprox the same)

All i will say is, You will have to print 24/7 for more then a month to get it all (printed)

When i had some vacation for aprox 3 weeks i almost printed every day,
After 7 weeks of printing aprox every day its now almost all gone (2 kilos of PLA)

I don't know your behavior as printing goes, so i have to estimate roughly you will be good for like 4 months of printing.