There is not a particular host hotel for this year's DOME.  There are numerous in the area to choose from including beachfront if you would like. There is a standing Larsen Motorsports discounted rate available at the Holiday Inn Express.

Hotel Accommodations - Non-Beach

Holiday Inn Express (Ask for Larsen Motorsports Rate) 
1206 Malibar Rd
Palm Bay, FL 

Boutique Hotel in Palm Bay | Holiday Inn Express & Suites Palm Bay

Hotel Melby
801 E. Strawbridge
Melbourne FL 32901

Modern Hotel in Melbourne, FL | Hotel Melby

Hyatt Place
747 Air Terminal Pkwy
Melbourne FL 32901

Melbourne, FL, Airport Hotels | Hyatt Place Melbourne Airport

Hotel Accommodations - Beach

Hilton Melbourne
3003 N Hwy A1A
Melbourne FL 32901

Hilton Oceanfront Hotel in Melbourne Beach, FL

Radison Oceanfront
3101 Hwy A1A
Melbourne FL 32901

Hotel in Melbourne, FL | Radisson Suite Hotel Oceanfront

Double Tree
1665 N Hwy A1A
Melbourne FL 32901

DoubleTree Suites Melbourne Beach Oceanfront Hotel