I recently moved to a smaller city and I go to gym but that doesn't have barbells. It has dumbbells (5lb to 50lb) , two rowing machines, three treadmills. I can invest in a medicine ball but can't in pull up bar due to narrow doors at home. This is a free gym in my apartment complex.

Is there a way I can bulk up using dumb bells, rowers and treadmills only ? I don't mind if the process is slow and strict, I'm willing to put in dedication, time and effort and minimize injury risk.

I have been working out 3 times a week 1-1.5hr doing full body for beginners in the sidebar for last 4 months.

The only one close to work or home is 70$/month and it has most of the equipments and I may need to reserve my sessions and end up wasting 1 hr commuting etc.

P.S. I'm a miserly cunt who's trying to save as much money as possible.