No time limit, you can buy an investment property right after you buy your first home. Lenders only require you notify them if there is any material change in the information on your loan application during the application process, after the loan is made you can do whatever you'd like.
Free Mortgage Advice & Pre-Approvals (FHA, VA, USDA, Fannie, Freddie, Non-Prime, Construction, Renovation/Rehab, Commercial) since 2002
Located in Southern California and lending in all 50 states