The first step would be to design a sufficient brooder.
Most important is that it's longer than it is wide, so there is a cool end and a warm end for the chicks to choose the temperature.
Many materials can work. From xxl plastic totes, metal troughs, or wooden / wire hutch designs. Even old furniture can be repurposed.
For the cold times and young chicks, I have a tent inside in a spare room that is working well (it's 4ft by 8ft and made for gardening, so it has good support for the light and such).
On the back porch we have homemade wooden brooders with hardware cloth. 2x4 in size. The lower level is actually a sturdy fish tank stand my mom built some years ago, we used dog exercise pen panels covered in hw cloth to close in the underside, and built a matching brooder on top.
The lower level has a 4x5 "run" on the side made of dog exercise pen panels (including the top) with plastic mesh to keep the chicks in. It is meant for daytime semi-supervised play, if we're going to leave the house we send them into the brooder.
What I'm trying to explain the long way is, you can get creative!
As long as the space provides chicks most basic need of temperature self-regulation and fresh air exchange.
- A proper heat lamp and fixture is needed. I really don't think regular light bulbs do the trick.
A lot of people swear by the DIY Mama heating pads, you might want to look into that, but I personally have not been able to make chicks happy with that setup, despite a lot of effort.
- Amprolium, in the form of medicated feed or Corrid added to the water, is a staple necessity.
- Stress reduction: Try to locate chicks where they won't be constantly stressed by factors such as other pets, loud human noise, entertainment devices and so on.
Try not to handle chicks excessively or in traumatic ways (block their view of the ground falling away, keep things calm and gentle, and leave them to their own devices most of the day).
If you don't have the resources necessary to begin with, just be patient and wait while you gather what you need as circumstances allow.