OHIO

I am a citizen of Australia.

If i were to enter the US soon (No K1) under the waiver program and get married and perhaps stay what would be my main concerns?

(possible denied at entry, possible denied status change?)

As the visa waiver program would only be valid for planed return travel? eg. 30 day trip to US.
How does this effect what actions should be taken..
Eg waiting to apply for change of status (*not planned* (does this work?)) may cause me to overstay visa.

Is it likely i would be able to leave the US for a holiday within 6 months?

If an E3 visa could be gained would this eliminate these problems?, with this current economic situation this may not be likely.

Please enlighten me