Wudu is something meant to be done immediately before prayer (5:6), thus there should be no issue of "breaking" it. Wudu is about washing the face, hands and feet. When it is done, it's done. However, if you are unclean in some way, wash it off (4:43, 5:6).
Uncleanliness "breaks" one's preparation for prayer.
A Psychological Problem:
I understand it is very difficult to leave Sunnism, particularly due to its "System of Subjection to Silly Questions" (sponsored by the "Harem for Holy Hearsay"). In this you ask how to perform wudu, how to walk, how to enter a house, how to eat, how to sleep, are tatoos haram etc. etc., but (for the folks at home), the response is to see that the System is simply a system. It is an institution designed to place importance on such things when there is none, thereby disabling the ability of the Sunni to disentangle his or her mind.
"Haram" and "Halal" - when applied to things which are not directly allowed or prohibited - are inadequate labels. Rather, things are to be placed on a spectrum of "Islamicness". For instance, tatoos do not help one be a better Muslim, and their only use is to appeal to people's superficiality (appearance etc.). Therefore the desire for a tatoo means there is something up with the Muslim's priorities. It thus becomes unofficially "haram", because there is no real "good intention" available. Everything should be judged by intention.
Should someone pray in front of a picture? If there is a picture in one's room, and it is in the line of sight between one and Mecca, foresight should instruct one to not put it there in the first place. This is because it might distract. If you can possibly know you will NOT be distracted, and that you will be 100% focussed in your prayer, then a picture of one's family may be visible. Of course pictures should be of something worth appreciating, and even if the person is non-Muslim, you are allowed to appreciate a memory (yes?).
Point is, you will most probably be distracted.
The list goes on, but it is an example of "judging by the Qur'an". The Qur'an says Muhammad only followed the Qur'an, so you must check these things. Also remember that "Haram" and "Halal" are prison bars used by the Sunni institution to prevent you using your brain.
I understand the next stage would be hadith "End Time" prophecies. This is where we explore the 'Harem for Holy Hearsay", and as long as we recognise that title, we never fall prey to the mirage. Why? Because you know what the Qur'an says about following humans.