yes, you can circle the world in a 30 foot boat - the first fiberglass
boat to sail around the world was a thirty foot allied seawind
. but if you're looking at 70 thousand dollar boats you can buy something more comfortable. and if you expect the wife to come along you had better consider her comforts.
both boats are ocean capable and both of them are way overpriced - the baba more than the union. you should be able to get an ocean capable boat in the 32 to 36 foot range for under forty thousand. if you're going small, look at the westsail 32 - dozens of them have gone around the world.
if you're lazy like me, stay away from teak
decks. too much maintenance
. get a diesel engine
- not gasoline. a sloop
or cutter rig. full keel
with internal ballast (not bolt on). rudder
and prop protection - no rudders hanging out in mid ocean on just the rudder
don't make electronics
a deal breaker. a boat with little or no electronics
may be cheaper and you will probably want to upgrade it anyway. lots of chain and big anchors is a plus. large fuel
and water - especially water - tankage is a plus if you'll be away from land for weeks at a time. but you'll learn to save water pretty quickly the first time you have to haul it from shore in jerry jugs. learn to use salt water
when you can and catch rainwater too. when i got really dirty from working on the engine
i just sat in the cockpit
while my wife dumped buckets of sea water over me - there are soaps that lather well in sea water.
and most important, start searching through this forum on any topic of interest to you. ask any question, no matter how dumb you think it is. ignore the naysayers.
and go now before it's too late....