This will make the cost of recording a song much lower and, as long as the sound engineer in the smaller studio is talented, the final product will be better, since you'll have more hours to work on your song with the same budget. In a recording studio, time is precious, both figuratively and literally, so it's highly recommended that you set realistic goals for audio recording and that you're ready to work efficiently. A simple phone call and you should be able to calculate how many hours you might need and get an idea of the price range and the cost of recording a song for yourself or your band. It is likely that a music industry professional can finish the vocals for a particular session within a few hours of recording, but this is only because they have a lot of experience and a lot of practice.
If you book time in a recording studio, you'll need a sound engineer who sits on the other side of the door and takes care of the recording and production process while you and your band play. If your song is already fully produced and you're only interested in recording vocals, this will take much less time than recording the song (s) from scratch. The cost of recording in a studio can vary considerably depending on factors such as the location, the reputation and quality of the studio, the length of the recording session, the equipment needed and whether an engineer or a producer is needed. From booking the right recording studio and finding the right producer, to scheduling conflicts and making arrangements, to spending countless hours in the recording booth trying out different things, it wasn't easy. The time, the cost of the study, the location, the equipment and services offered, and the experience, are important factors that must be considered when choosing a study.
You'll need to plan ahead and know your budget, the studio you want to book, the number of hours you'll need and the total cost. Soundbetter, which is an online mixing service, has a calculator that apparently calculates the cost of producing and mixing a song, but since the site works with fixed prices, it seems to me that the prices on the calculator are actually higher than the average price my customers pay. However, this will take time and will require dedication and investment on your part, so if you have a deadline, you may want to work with a professional to accelerate the process. If you only plan to record one or two songs, this will take much less time than recording an EP (extended play, usually three songs or more) or a full album.
A good initial recording will save everyone time and money, since the engineer will have to work less with the music during post-production. There are no official average times for recording and mixing, but I'm going to give my times here, which are more or less those of the most experienced engineers and making songs ready for the radio.