Need help regarding buying a used construction equipment.

Hey everyone,

I have recently started my small construction company and has been dealing with few of the small projects for now. Until now, I was renting equipment for my projects but now I am thinking to invest and buy a used construction equipment so that I can save few more bucks in profit.

Which equipment should I go for that will be enough for me doing multitasking?

And it would be great if you lead me to the reliable used construction equipment dealer as well.

All the other suggestions are greatly welcomed.
Thanks in advance!