There are many risks involved when bidding out your greenhouse project! Here is a list outlining some of those risks. It is from an article about roofing but is just as true regarding any project. Whether it be your home or your greenhouse, being well informed and comparing ALL bids is your greatest weapon.
The Top Reasons to Eliminate the Lowest Bidder from Your List
Choosing the lowest bidder can look like a smart, money saving move, but it rarely works out.
Every contractor is in business to make money and if you accept the lowest bid, you will either end up with quality issues or paying more than the original quote. Either way you end up losing.
Before you sign any proposal consider this information carefully.