Finance at purchase OR pay cash and then get loan - vacant land

[Rhonda Green]

Purchasing raw land in Lake Tahoe.  Negotiated deal directly with seller and paying $500K for lot.  Should I purchase $500k cash at end of negotiated 90 day escrow and then get loan after transaction completed or use the 90 day period seller has approved and get loan and put 25% down for investment property?  Planning on holding on to property for 2-3 yrs and either selling or building 4-plex as it has development rights.  Thank you for your input;)