Just bought a house how; quickly should I look at buying another?

[Anton Watt]

My client has a very large retirement fund and just closed her first investment home. Today she asked me to sell her another property just 5 days after her first closing. She is a new investor and I advised her to complete this job before looking at buying another. My more experienced investors I trust to take on multiple projects at a time so I do not worry about selling them more but since she is new I feel like it would be better for her to go through at least one before looking at another. Would you all agree or should I just keep selling her properties?