To begin, it's crucial to note that Albania is not a member of the Eurozone. They still use their own currency, the Albanian Lek, which has a current exchange rate of about 133 Lek per euro as of February 2018. Euros and US dollars, on the other hand, are widely accepted and can be exchanged throughout the country.
Albania is, by all accounts, a cheap nation to visit and move around in. This is as affordable a vacation as you'll find anywhere on the continent, especially by European standards.
If you're on a limited budget, you should be able to get by on less than €50 per person per day, which includes cheap lodging and all meals. A dorm bed in a hostel costs between €15 and €20, whereas a double room in a budget hotel might cost up to €40. Hotel rooms in the midrange range from €40 to €60. A beautiful room at a high-end hotel in the city costs up to €80, which is still relatively affordable compared to other parts of Europe.
For the most part, a daily budget of €50-100 will bring you anything you could possibly want during your time to Albania.
If, on the other hand, you want to visit a lot of museums and historic sites with admission prices, stay in a high-end hotel, and eat out at luxury restaurants numerous times, you should budget at least €100 per day.
It's also worth noting that tips are always appreciated in restaurants and are frequently required in high-end establishments. Tips of roughly ten percent are adequate. In establishments like pubs and coffeehouses, leaving some tiny change—rounding up the bill—is the nice thing to do.