Cheaper does not mean better.
Money can be tight. I have been there and I understand that, but when getting quotes ask a lot of questions. Don’t be afraid to ask for references, and be sure to compare apples with apples.
I often see other Tradies just cutting corners with work they should be doing. Or using cheap products, so they can still win the job and make good money. Thats when the home owner looses.
I was recently undercut on a gas-line quote. I was surprised as there was a big cost in material, and I thought my price was very fair.
Later I was asked to come and connect a cooktop at the same job, only to discover the new gas line was half the size it should be, and there was two gas leaks in the new gas line.
So after taking short cuts on materials the other bloke did not even bother to test his own gas line, and the home owner is still waiting for the certificate of compliance he was promised.
A home is a large investment. Whoever you use, be sure you will get what your paying for, and that the job will be done right, and in accordance with the relevant laws.