As many millennials struggle to come up with the cash to buy their first home, plenty of other folks are looking to buy their second. Summer is squarely aimed at the latter group.

Even for those affluent enough to think about a second home, there is still a tremendous amount of both cost and risk associated with that sort of purchase -- enough to dissuade them from the move altogether. First world problems, but problems nonetheless.

Summer tries to bring down a lot of those barriers by offering a try before you buy model.

Here's how it works:

Folks interested in a second home can either browse homes on Summer or co-shop alongside the startup for a house (in markets where Summer operates). The company buys the home in an all-cash offer, but the Summer member puts up a refundable 20 percent fee and pays a monthly subscription cost based on the amount of time they want to spend in the home.

So, let's say a Summer member wants to spend 90 days in the home. Summer calculates the per-night value of the home as it would be on a home sharing platform like Airbnb and splits it across monthly payments for the year. However, the startup also takes into account peak travel times, so three weeks in July in the Hamptons may take up more of that 'subscription credit' than 3 months in the winter.

Summer gives that member three years to decide whether or not they want to purchase the home. If they do, Summer puts 100 percent of the up-front payment and 50 percent of the monthly payments towards the purchase of the home. If not, Summer fully refunds the 20 percent downpayment.

When the member isn't in the home, Summer covers all the operational and maintenance costs of the space — from furnishing to cleaning to repairs — and also lists it on Airbnb. During the rental period, 100 percent of the revenue from rentals goes to Summer. If the member chooses to purchase, Summer described the option to enter into a revenue share agreement.

Summer listing