yikes - with 50 lb max db's I'm not sure there is much you should expect. I'd say go outside with your wife. Put the car in neutral and push that son'b!tch around the block until you puke. then do some uphill sprints. that covers leg day.
do pull ups until your arms fall off the do some DB rows - thats back day
then do push ups until you make a puddle of sweat on the floor then do some over head presses or db flyes... chest day
I'm familiar with the Havoc bible - I don't recall it saying for beginners to start at 30 mg/day doses but I'll take a look again and take your word on it. That being said I can think of many other articles that rec a small dose for first week newbies.
I had nice results with pulsing. Nice enough to recommend it to people. I know a lot of ppl knock it - but have they tried it??? I'd say you should look into it given your limited resources. Extend your cycle by pulsing and get some solid, gradual gains over the course of it. I'm just some meathead but I would say without big weights youre not going to activate enough stimulation and neuro-responders to see big gains in 5 weeks - BUt go for 8-9 weeks in pulse and you may see some really decent improvement.
(....let the ridicule and objections begin) but it's a user blog where we all chime in and give our 2 cents. take it or leave it.