Let make a little calculation:
Running a company with 10 people - administrative and accounting costs︀ - 2000+ Eur / month
Minimum wage in Portugal for 10 people: 7400 + Eur︁ / month
Mandatory health insurance, taxes, social insurance for 10 people which has to be︂ paid by your company: 8100 + Eur / month
If you buy a land worth︃ 100,000 Eur, your annual real estate tax recalculated annual amount to months: 180 + Eur︄ / month
Banking seef, insurance fees, other fees: 200 + Eur / month
Minimum annual︅ health and social insurance for you: 810 Eur / month
If I sum it, it︆ is at least 18,690 Eur per month. What is 224,280 Eur per year.
Time till︇ citizenship application: 6 years.
Total costs in 6 years just to hold yor residence permit:︈ 1,345,680 + Eur.
And I have not counted on fact, that minimum wage, minimum social︉ insurance, minimum tax and minimum health insurance is growing every year.
If you are willing︊ to invest 1,5 mil USD in 6 years, almost any country in a world will︋ gladly welcome you. And you do not have to start a farm in Portugal..