The Saiyan Army was built around conquering planets and fighting in fierce battles and brutal wars. Many Saiyan warriors have come home hurt so badly that if they didn't receive top-notch medical care, they surely would have died. After their dealings with the Planet Trade Organization, the Saiyans received rejuvenation tanks to hasten their recovery times. Over the years, they have honed this technology and now house a huge chamber of rejuvenation tanks. You can use the rejuvenation chambers they have on the base at a fee of 200 zeni per use. It will reduce the healing time required after losing a battle from 2 weeks to 1 week. 2nd class Saiyans can use the on-base rejuvenation tank for 100 zeni and 1st class Saiyans or above may use it for free.