I must say that denmark is one of the most expensive places to live. I was in Copenhagen only for three months and i find it as one of the most expensive places in Europe. Besides, in Europe, every country has their own language and hence, if u want a job, u have to learn the local languge, here in Danish.Some people also manage having jobs without lanaguage skills but thats all luck and personal contacts. Accomodation costs are really mounting in Roskilde. To sustain your living, you need at least 6000 Danish kr (minimum amount) per month.
For academics, you dont have any problem with english as everyone speaks english and are truly professional. Denamrk is considered to be the best academic place in Scandinvia with the best student facilities acroos the globe. Its indeed one of the recommended place to study provided that u have secure funding.