I plan too buy land in the islands,build a few houses and start plantations.As a retirement an help wifes mum/siblings & partners/kids.?

Not much jobs there,basically live simple life but do need money for necessities.esp If you want too live a comfortable life.Now we will basically be feeding the whole family,paying the bills and whatever else needed.Algud there,no problems.I suggested too my wife,If we going to do that,I would expect her family(except her mum)too basically do all up keep of the land and house etc.I dnt like the idea of anyone,sitting around,doing nothing,while being taken care of,esp if they young and healthy.Wifes siblings in there 20's and partners.She got annoyed saying that im using her family like slaves?or house keepers?I don't understand,I will be supporting all of them and making life easier and stress free and in return they do what they normally do around the house/land for nothing!! That is my 1 condition if I buy land,build houses for everyone too live in and pay all the bills and neccessaties.They want too leave current island for the next island,hence new land etc.Too much to ask for??