Disaster Building

Hello! I am new to this forum.  I've been playing or about 2 months now and I can't seem to collect the necessary items to unleash a Dr. Vu disaster quick enough.  I bought his tower maybe 2 weeks ago and I have only collected enough red buttons to unleash 2 disasters.  I am not on the game all day but I do log in a few times a day to click on thought bubbles to try and obtain the red buttons.  Any tips on how to get more red buttons? Also, when I started playing I did not realize the best way to build your town.  Because of this, I can't seem to fit education buildings and other important services within my homes to make people happy because there is no space.  I initially thought about just moving everything away from an area and then replacing them in better spots, but I already upgraded numerous roads to avenues (which cost a fortune)and do not want to have to pay for that again.  Any tips would be appreciated, thank you!