LOS ANGELES — Rental homes will remain an attractive option next year to would-be homebuyers sidelined by high mortgage rates and rising home prices, analysts say. American Homes 4 Rent and Invitation Homes are two big real estate investment trusts poised to benefit from the trend, say analysts at Mizuho Securities USA and Raymond James & Associates. Their outlooks boil down to a simple thesis: Many Americans will continue to have a difficult time finding a single-family home that they can afford to buy, which will make renting a house an attractive alternative. It starts with mortgage rates.