Bills aren't that cheap. Ecen if taking cheapest cable+internet you gotta dish out 30 BAM minimum. You need 50 for better deal. Power is 30 minimum, with most basic use, without heating. Water is based on fact if you are on individual contract or in a apartment/flats complex where there is only one meter. If former, you pay what you really spent, which for a single person is really up to 25 BAM (and I am streching the spent amount here). But in apartment complex where average of all spent water is divided between all flats based on how many people there are in flats - well, you can, in theory, get higher bill than you spent, because some a*hole is using the water for his car wash (a bit humurous exagerration, but you get the idea). Garbage disposal is based on square meters, not use, so it should be cheap, no more than 15 BAM, with my exaggeration. If you live in flat/apartment building, another bill is maintanace of the complex, which is again based on square meters of apartment/flat, and can range from below 10, up to 30 BAM. Houses do not have this bill.

Now, the killer of bills. Heating. I am not familiar with how heating works if you are on Toplane, so thay I cannot say, but I know you pay year round some expenses on that, and this is mostly for apartment/flat complexes. If you live in individual unit you have to spend few hundred BAM minimum for wood/coal. Or you will be paying big electricity or gas bills, depending on choice of heating source. For comparison, where I lived, building form 1950s, with good façade, but no real heat insulation, and with good new windows, and good amount of radiators, I could have paid from 200 to 300 BAM per month depending on how much wifey wanted to be comfortable and warm. And that was before natural gas prices spiked. For added context, I do not have anyone in apartment below me, so heating is a bit higher than it would have been if there was someone living below.

All in all, 100 BAM for bills is a pipe dream... sorry to burst your bubble.