Work and Sunday

I am taking Sunday as a sacred day, spared to the Lord.
I would really like to study companies, real estate, trends, etc. i.e, money related things; but Sunday must be a different day.
However, the Bible itself talks a lot about money; so on Sunday, I think it is possible to think about money but asking questions such as:
- Am I being greed, trusting on money as some provider to me?
- The Lord set me free from slavery; am I living as a free man?
- I would like very much to have a company where my children work with me. Is it only a dream? I don't have any idea what to do... but would the Lord help me in such enterprise?

The Lord wants that his children work in order to eat.
The first job assigned to man was gardening.
Gardening is very interesting: it is necessary to choose a proper location to the plant, to fight against fungos, insects, birds; etc. It is necessary to participate in God's creation.
I would like to make a familiar enterprise related to some aspect of creation.
Some ideas:
- have a vineyard in Portugal.
- create lambs in Uruguay.
but these ideas are very distant from what I am used to; so let me think some closer ideas:
- English school - Do I know English to myself? Not the greatest idea...
- security - some company that deals with security; cameras installation, image processing, etc.
-