Experts help : Reduce labour costs by using simple power equipment and power tools.

I want to reduce labor costs by using simple power equipment and power tools. This is my goal.
Why am I asking a simple power equipment and power tools?
Because my projects are small.
So I don't need heavy equipment.
I am waiting for the expert's help to achieve my goal.
Some simple power equipment and tools I had seen, I share here the details.
Choosing the brand and models is challenging.
People using these kinds of tools and equipment are only having experience and know the qualities and performance. That is why I post here,
1. Mini Concrete Mixer (1/2 Bag)
2. Needle Vibrator (1HP)
3. Mortar Mixing Drum (electric)
4. Wall Chaser Machine
5. Spray Plastering Machine

I am from Tamil Nadu. I need cheap and the best brands that people are widely using, and say good
Expecting the Cheapest price, durability, Repair locally, cheap spare parts, and also local availability
OR if any imported brands are also ok to fulfill the needs

Waiting for experts replies

Thanking you