<prompt> Human: This may not be the right subreddit, but this is the only one I look at and the people here seem pretty level-headed, so I thought Id give it a go:Background:Been married for about 3.5 years, wife and I finished school a couple years ago. We gross about 140k, and just bought a house 200k, put down 100k. We were able to put down a big down payment since we both like to save money, and both studied things that have application in the market place. MILs reaction:MIL was super happy that we bought a home, came and visited, almost cried that her daughter had her own home. All fine. Unfortunately, she is worried that her other three kids one older than wife, two younger will be jealous that we have our own house. I have nothing against my siblings-in-law, but they arent good with money. The younger two are supported by my MIL since they only work part time and the older one lives paycheck to paycheck. MIL has decided that she wants to buy houses for her other kids. Thatd be fine if she had a big pile of money, but she doesnt. She makes a ton of money 200k gross but its all spent on her dependent adult kids, new cars, furniture, whole life insurance policies, organic pet food... you get the picture. She has maybe a net worth of 250k, including the equity in her home.Personal Finance Question:How do I convince my MIL, from a personal finance perspective, it isnt the best idea to buy 3 houses? She somewhat justifies it since she helps 2 of the kids with their rent, so she really is only adding one payment to her load. I have tried to talk to her about retirement, but the current plan is for her to die at her desk working.Assistant: You dont need to as no one is gonna give her the loansHuman: A bank will, since theyll be rentalsinvestment properties and not personal residences. Shes already talked to Wells Fargo and it seems like theyd do it.  <response>: You generally need 30 percent down for investment properties. They wont give her the money. 