Grand Theft Auto: Vice City Stories Safehouses Guide

"Barracks"
How to get it: Complete the mission: "Soldier"
What´s available in there: Pistol
Location of the Red Ballons weapons: It´s in the left side of the barracks.
What vehicles you can buy: Nothing
Garage: No

Note: You´ll lose it after you complete the mission "Condut Unbecoming", and there´s no way to get it back.

"101 Bayshore Avenue"
How to get it: Complete the mission: "Condut Unbecoming"
What´s available there: Health and change of outfit
Location of the Red Ballons weapons: It´s in the back of the safehouse
What vehicles you can buy: Nothing
Garage: Yes
Cars/bikes you can store: 1

"The Compound"
How to get it: Complete the mission: "D.I.V.O.R.C.E"
What´s available in there: Health and change of outfit
Location of the Red Ballons weapons: It´s in the left side of the garage.
What vehicles you can buy: Splitz-6 ATV by paying 4500$; How to get it on sale: Do the mission "From Zero to Hero"
Garage: Yes
Cars/bikes you can store in garage: 1

"The Clymenus Suite"
How to get it: Complete the mission "From Zero to Hero"
What´s available in there: Health and change of outfit
Location of the Red Ballons weapons: It´s in the back of the safehouse
What vehicles you can buy: Little Willie by paying 5000$; How to get it on sale: Do the mission "From Zero to Hero" and Bovver '64 by paying 4500$; How to get in sale: Do the mission "White Lies"
Garage: Yes
Cars/bikes you can store in garage: 3