Vivinavi

This is my first time using this section.　

I would like to start renovating my bathroom ＆ kitchen, etc., but I am a complete novice and have no idea where to start.
I have a limited budget, so I wanted to gather some "basic flow" and "useful information" before taking action.

Therefore, I would like to ask for your experiences and any other useful information you may have to share.　Thank you very much.

For example.
・ Are Lowe's and Home Depot places for people who can decide on their own design, ？ or ？
・ What is the budget difference between having a renovation company do the work and relying on Lowe's and the like? ＆ Do you know if there is any difference in the finished product ？
・ Is there any way to know if the price quoted is reasonable or not? <2265> ・ Do you have any information that we should know about ！ ？
・ Do you know if there is a big exhibition hall where we can see and compare the actual products ？
・ Do you have a carpenter who will come? ？ （ Do you have anything we should prepare for the carpenters and others who will come to the show Drinks?　Tipping is required ？ ）

I'm sorry, I don't understand a lot of things.
If there is anything I should know before taking action, or anything I should be aware of after taking action, please let me know.

Thank you very much.