You said this is a thirty amp generator and will produce approximately twenty four amps continuously.
To this machine you are going to add over 29 amps and expect it to carry it all?
The easiest way to connect one of those small generators to you home is through the use of drop cords from the equipment to the generator. The cost of installing a transfer switch in the proper manner will end up costing more than the generator.
A second thing about these generators is they don’t give a very clean signal. The voltage does not hold very steady and neither does the cycles. To use this generator could cause damage to electronic equipment.
The end cap or male plug that the cord is connected to must be on the outside not on the inside close to anything.
The grounded neutral is connected to the grounding electrode at your service. When this generator is connected to the dwelling unit’s wiring system then the grounded neutral must be separated on the generator. When this is done then the receptacles on the generator no longer have a fault current path and are dangerous.
If the grounded neutral of the generator is not going to be lifted at the generator then it must be separated at the dwelling unit’s service equipment again a major issue.
Remember that just because it works in no way means its safe. It is just as quick to set up the generator and temporally install cords through a part open window as it is to set up the generator and run back and forth switching circuits on and off to keep the generator from stalling out.
Covered on the test I designed for DIY and generators entailed the following articles;
Article 110 Parts I and II
Article 200 Use and Identification of Grounded Conductors
Article 210 Branch Circuits Parts I and II
Article 215 Feeders
Article 220 Branch-Circuit, Feeder, and Service Calculations Parts I-IV
Article 225 Outside Branch Circuits and Feeders (with special attention to Part II)
Article 230 Services Parts IV, V, VI, VII
Article 240 Overcurrent Protection
Article 250 Grounding and Bonding (special attention to Part II)
Article 445 Generators
Article 702 Optional Standby Systems
These articles have a wealth of information concerning the installation of generators.
Be advised that generators manufactured after 1-01-2011 that are smaller than 15kw will be required to have GFCI protection for all receptacles outlets. This in and of its self will mandate that portable generator be used with cords only or the neutral will be required to be switched at the building supplied. For reference see the 2011 cycle of the NEC in Article 590 and Section 6 (590.6).
EDITED TO ADD:
(3) Receptacles on 15-kW or less Portable Generators.
All 125-volt and 125/250-volt, single-phase, 15-, 20-, and 30-ampere receptacle outlets that are a part of a 15-kW or smaller portable generator shall have listed ground-fault circuit-interrupter protection for personnel. All 15- and 20-ampere, 125- and 250-volt receptacles, including those that are part of a portable generator, used in a damp or wet location shall comply with 406.9(A) and (B). Listed cord sets or devices incorporating listed ground-fault circuit-interrupter protection for personnel identified for portable use shall be permitted for use with 15-kW or less portable generators manufactured or remanufactured prior to January 1, 2011.
I though it would be nice to post the code section here for everyone to see. Notice that this section clearly says that any cord used on generators built before this date will require the GFCI protection in the cord used.